after changing gear ratios, the speedo will be waaayyy off...After the -1 +2 conversion on mine, it was about 18.5% off... I lost around 20 MPH top end. So I top out at 143-145...you dont REALLY need to go that fast anyways nor are there many roads around where I live that are long enough to reach 160ish MPH anyways

 

i also have this. it was just like this when i bought it, if i had a choice idk what id choose, b/c i dont know what my bike would feel like w. stock gearing but i would like the speedo to be right.

when you have this done, does it make ur speedometer read faster, or slower than what youre actually going?

how much gas mileage might it be costing me?
i may prefer the better mpg than low end power, so i may want to go back to stock, i just need some opinions.

 

The speedometer reads faster than you are really going. If you have a speedohealer then you know your actually speeding when you get pulled over. As for gas mileage, most of it depends on how you ride. How many rpms you ride at, what gear you ride around town in. With a -1 on my bike and riding around in 1st and 2nd gear at around 7,000 rpms. I get about 130 miles to my tank, then my reserve bars kick in.I average about 37 miles to the gallon in town.

 

I got the RK -1 front sprocket and 520 chain kit installed yesterday. It retails for around $130.. I really love it.I don't bog the engine as much from a red light.. and good acceleration all around. I personally love it.

 

Glad to hear you love the kit...I had the same kit on mine. When it was time to replace sprockets, I went with -1+2 and loved it...it felt lika a whole newbike to me and I had to relearn throttle control for wheelies. the amount of extra accelleration was amazing. Next on the list is a quick throttle kit

 

yea i noticed that cruisin around on mine i have try to ride in like 4th gear at like 35 miles an hour (this is also with the rpms at like 4000 maybe?) i know when i was cruisin at like 60 (on the speedo which is wrong) so less than 60 i was revvin at about 5500 rpm in 6th gear, is this high?
i sounds like im gunning it but it just to keep it at the speed... this is also my first bike so it may b ehow loud sport bikes always sound, so i was just wondering is that was a high rpm...

also when you ge the speedo do you have to calibrate it? or do you just plug it in and it figures out how much everything is off automatically?

 

Your RPMS are normal...
You have to go through a series of steps to calibrate the speedo healer. I think someone posted a link to the web site that might help expalin the steps needed

 

ok, how far off is the speedo usually when you do this conversion?
i just want to know because i havent had time to get side by side someone i know and see how fast we are each giong (to find out how much its off)
and i def cant afford a speeding ticket, but it seems like when my speedo is at like 48 (in a 40)im getting passed by almost everyone... and i know most ppl go over teh speedlimit but this people are passing me like theyre going 10 mph faster than me... so i just wanted to know an approximate of how far it could be off...
is it like 4 - 5 mph, or is it more like 10-15 mph??

 

I am new to bikes, but I don't think it would work like that with gearing. It would seem that the faster you go the furter off you your speedo. I don't think you can say you are always 5mph slower than the speedo, when those numbers may be different at 35mph, 70mph, and 140mph. It seems you may be 5mph off at 50, 8mph at 80, and 15 mph at 130. Does that seem logical?

 

yea that makes sense.
so i guess what im askin is what is a typical percentage i may be off w. the -1/+2 vortex sprockets?
i just want to know because i dont want to be movin like a slug downt he road, but i dont wanna get pulled over either, so what is the average, or typical percent ur speedo gets thrown off with this set up?